I’ve always thought that the fastest draw was to already have the weapon in your hand.
I once interviewed a criminal who had used The Bag Trick to stab someone. I explored using it and found that it was quite handy. I was issued an unmarked truck in my cop job and kept the glove compartment filled with plastic shopping bags.
When I was in plain clothes as a cop, I regularly walked into public businesses that had activated a silent alarm while carrying a revolver hidden in a grocery bag in my hand in an attempt to catch (or shoot) the robbers without triggering a hostage situation by flooding the building with uniformed cops.

Revolvers work better than autopistols for this trick. Stainless steel revolvers are less visible than blued steel.
I’m a big guy and I sweat a lot when I exercise in the hot Texas sun. When I’m doing my hiking or running outside, I always carry a sweat towel. The towel works similarly to the grocery bag to hide a weapon carried in hand.

A little-known weapon carry system.
If I’m in a potentially dangerous place and don’t want to wear a holster or a fanny pack, I’ll carry a snub revolver in my hand hidden in the towel. When I carry like this, I’ll only carry a revolver that has a clipdraw. I want to be able to tuck the gun quickly into my waistband if I need both hands.

J-frame wrapped in towel and carried during my workout
No one notices the gun wrapped in the towel.
I took a hike yesterday on the 2.5 mile wooded trail that runs through an undeveloped park-like area in my neighborhood. I usually hike in the absolute heat of the summer day to build up my heat tolerance for spending long weekends teaching on outdoor ranges. When I do my daily hike at 3pm-4pm in the Texas summer, I rarely encounter other people. It’s too hot for the normies to be outside.
Yesterday I had a couple of afternoon medical appointments. My daily hike didn’t take place until 6 pm. Lots of people were on the trail walking or running after work.
It was about 95 degrees, but there was a nice breeze blowing. I was carrying my Glock 26 in a fanny pack, but I still had a sweat towel (without a gun) in my hand.
This particular hike takes me about 45 minutes and I do it several times a week for exercise. Due to my unusual hiking time, I encountered quite a few residents walking their dogs on the hiking trail.
Yesterday on the 45 minutes hike, I had not one, but TWO different dogs try to take the towel out of my hand or play tug-of-war with it as I passed them on the trail. The two dogs (a Weimaraner and a black lab) were just being playful and thought my sweat rag was a chew or pull toy.
That has never happened to me before.
It made me think that if I had been carrying my revolver in the towel, I could have had a problem.
Something to consider if you utilize this unconventional carry method. If you see a dog approaching, move the gun/towel to the hand farthest away from it and don’t leave the towel dangling anywhere near the dog’s mouth.
As I mentioned in the article about the Bag Trick, I hadn’t considered that someone might try to steal the bag that held my knife in Egypt. Likewise, I hadn’t considered that a dog (or two) might try to use my “holster” as a chew toy.
Be careful.